From 44f7e6f800dc1f6f2fc29e713bc49e1255856b2e Mon Sep 17 00:00:00 2001
From: Azul <azul@riseup.net>
Date: Wed, 31 Jan 2018 10:06:21 +0100
Subject: git subrepo clone https://leap.se/git/srp_js
 app/assets/javascripts/srp

subrepo:
  subdir:   "app/assets/javascripts/srp"
  merged:   "2088cbe"
upstream:
  origin:   "https://leap.se/git/srp_js"
  branch:   "master"
  commit:   "2088cbe"
git-subrepo:
  version:  "0.3.1"
  origin:   "https://github.com/ingydotnet/git-subrepo"
  commit:   "a7ee886"
---
 app/assets/javascripts/srp/lib/SHA256.js | 100 +++++++++++++++++++++++++++++++
 1 file changed, 100 insertions(+)
 create mode 100644 app/assets/javascripts/srp/lib/SHA256.js

(limited to 'app/assets/javascripts/srp/lib/SHA256.js')

diff --git a/app/assets/javascripts/srp/lib/SHA256.js b/app/assets/javascripts/srp/lib/SHA256.js
new file mode 100644
index 0000000..f47077b
--- /dev/null
+++ b/app/assets/javascripts/srp/lib/SHA256.js
@@ -0,0 +1,100 @@
+/**
+*
+*  Secure Hash Algorithm (SHA256)
+*  http://www.webtoolkit.info/
+*
+*  Original code by Angel Marin, Paul Johnston.
+*
+**/
+ 
+function SHA256(s){
+ 
+	var chrsz   = 8;
+	var hexcase = 0;
+ 
+	function safe_add (x, y) {
+		var lsw = (x & 0xFFFF) + (y & 0xFFFF);
+		var msw = (x >> 16) + (y >> 16) + (lsw >> 16);
+		return (msw << 16) | (lsw & 0xFFFF);
+	}
+ 
+	function S (X, n) { return ( X >>> n ) | (X << (32 - n)); }
+	function R (X, n) { return ( X >>> n ); }
+	function Ch(x, y, z) { return ((x & y) ^ ((~x) & z)); }
+	function Maj(x, y, z) { return ((x & y) ^ (x & z) ^ (y & z)); }
+	function Sigma0256(x) { return (S(x, 2) ^ S(x, 13) ^ S(x, 22)); }
+	function Sigma1256(x) { return (S(x, 6) ^ S(x, 11) ^ S(x, 25)); }
+	function Gamma0256(x) { return (S(x, 7) ^ S(x, 18) ^ R(x, 3)); }
+	function Gamma1256(x) { return (S(x, 17) ^ S(x, 19) ^ R(x, 10)); }
+ 
+	function core_sha256 (m, l) {
+		var K = new Array(0x428A2F98, 0x71374491, 0xB5C0FBCF, 0xE9B5DBA5, 0x3956C25B, 0x59F111F1, 0x923F82A4, 0xAB1C5ED5, 0xD807AA98, 0x12835B01, 0x243185BE, 0x550C7DC3, 0x72BE5D74, 0x80DEB1FE, 0x9BDC06A7, 0xC19BF174, 0xE49B69C1, 0xEFBE4786, 0xFC19DC6, 0x240CA1CC, 0x2DE92C6F, 0x4A7484AA, 0x5CB0A9DC, 0x76F988DA, 0x983E5152, 0xA831C66D, 0xB00327C8, 0xBF597FC7, 0xC6E00BF3, 0xD5A79147, 0x6CA6351, 0x14292967, 0x27B70A85, 0x2E1B2138, 0x4D2C6DFC, 0x53380D13, 0x650A7354, 0x766A0ABB, 0x81C2C92E, 0x92722C85, 0xA2BFE8A1, 0xA81A664B, 0xC24B8B70, 0xC76C51A3, 0xD192E819, 0xD6990624, 0xF40E3585, 0x106AA070, 0x19A4C116, 0x1E376C08, 0x2748774C, 0x34B0BCB5, 0x391C0CB3, 0x4ED8AA4A, 0x5B9CCA4F, 0x682E6FF3, 0x748F82EE, 0x78A5636F, 0x84C87814, 0x8CC70208, 0x90BEFFFA, 0xA4506CEB, 0xBEF9A3F7, 0xC67178F2);
+		var HASH = new Array(0x6A09E667, 0xBB67AE85, 0x3C6EF372, 0xA54FF53A, 0x510E527F, 0x9B05688C, 0x1F83D9AB, 0x5BE0CD19);
+		var W = new Array(64);
+		var a, b, c, d, e, f, g, h, i, j;
+		var T1, T2;
+ 
+		m[l >> 5] |= 0x80 << (24 - l % 32);
+		m[((l + 64 >> 9) << 4) + 15] = l;
+ 
+		for ( var i = 0; i<m.length; i+=16 ) {
+			a = HASH[0];
+			b = HASH[1];
+			c = HASH[2];
+			d = HASH[3];
+			e = HASH[4];
+			f = HASH[5];
+			g = HASH[6];
+			h = HASH[7];
+ 
+			for ( var j = 0; j<64; j++) {
+				if (j < 16) W[j] = m[j + i];
+				else W[j] = safe_add(safe_add(safe_add(Gamma1256(W[j - 2]), W[j - 7]), Gamma0256(W[j - 15])), W[j - 16]);
+ 
+				T1 = safe_add(safe_add(safe_add(safe_add(h, Sigma1256(e)), Ch(e, f, g)), K[j]), W[j]);
+				T2 = safe_add(Sigma0256(a), Maj(a, b, c));
+ 
+				h = g;
+				g = f;
+				f = e;
+				e = safe_add(d, T1);
+				d = c;
+				c = b;
+				b = a;
+				a = safe_add(T1, T2);
+			}
+ 
+			HASH[0] = safe_add(a, HASH[0]);
+			HASH[1] = safe_add(b, HASH[1]);
+			HASH[2] = safe_add(c, HASH[2]);
+			HASH[3] = safe_add(d, HASH[3]);
+			HASH[4] = safe_add(e, HASH[4]);
+			HASH[5] = safe_add(f, HASH[5]);
+			HASH[6] = safe_add(g, HASH[6]);
+			HASH[7] = safe_add(h, HASH[7]);
+		}
+		return HASH;
+	}
+ 
+	function str2binb (str) {
+		var bin = Array();
+		var mask = (1 << chrsz) - 1;
+		for(var i = 0; i < str.length * chrsz; i += chrsz) {
+			bin[i>>5] |= (str.charCodeAt(i / chrsz) & mask) << (24 - i%32);
+		}
+		return bin;
+	}
+ 
+	function binb2hex (binarray) {
+		var hex_tab = hexcase ? "0123456789ABCDEF" : "0123456789abcdef";
+		var str = "";
+		for(var i = 0; i < binarray.length * 4; i++) {
+			str += hex_tab.charAt((binarray[i>>2] >> ((3 - i%4)*8+4)) & 0xF) +
+			hex_tab.charAt((binarray[i>>2] >> ((3 - i%4)*8  )) & 0xF);
+		}
+		return str;
+	}
+
+	return binb2hex(core_sha256(str2binb(s), s.length * chrsz));
+ 
+}
-- 
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